Basin for softening or cooking in water or other liquid stocks preparatory to the manufacture of veneer, mechanical pulp, or the like thereof



March 2 1926. 1,574,818

A. E. HOLMBERG BASIN FOR soFTENING OR COOKING IN WATER on OTHER LIQUID STOCKS PREPARATORY To THE MANUFACTURE OF VENEER, MECHANICAL PULP, OR THE LIKE THEREOF Filed June 1. 1925 Patented Mar. 2, 192%.

Parana saggy) AXEL EMANUEL HOLMBERG, OF IJUSEIE, SVJ EBE N, A$SIGNOR TO LJUSNFi-IR OXNA AKTIEBOLAG, OF LJUSNE, SWE'JEN, A CGRPORATEON OF Si/VEDEN.

BASIN FOR SOFTENING OR COGKIIQ'G EN VJATER 01% OTHER LTQUID STOCKS PREPARA- TORY TO THE MANUFACTURE 0L VENEER,

THEREOF.

MECHANTCAL PULP, OR THE LIKE Application filed June 1, i925. Serial No. 34,093.

T v0 alt whom it may concern:

Be it known that I, Axnn EMANUEL I-Iomunnne, a citizen of the Kingdom of Sweden, residing at Ljusne, Sweden, have invented a new and useful improved basin a for softening or cooking in water or other liquid stocks preparatory to the manufacture of veneer, mechanical pulp, or the like thereof, of which the following is a specification.

The present invention relates to a basin for softening or cooking in water or other liquid stocks preparatory to the manufacture of veneer, mechanical pulp or the like thereof.

In basins heretofore used for such purpose no means are provided for securing a uniform softening of the stocks or a uniform dissolution of the incrusted lignin or resin substances surrounding the fibres, i. e. the time during which a stock passes through the liquid in the basin cannot be determined. The object of the present invention is to remove this disadvantage.

The invention consists in the combination of a basin having an approximately semicylinudrical bottom surface and a freely rotatable wing or shovel wheel journalled in said basin, the shaft of said wheel coinciding substantially with the axis of the semicylindrical-bottom surface of' the basin and the wings or shovels of said wheel being of such radial extension as to prevent the stocks from passing between the bottom surface of the basin and the free ends of the wings or shovels. All stocks supplied to the basin at one side thereof are parallel to the shaft of the wing wheel and are compelled to pass through the basin during a time which is determined by the speed of rotation of the wing wheel which speed in its order is dependent on the quantity of stocks supplied in a unit of time to the basin.

In the accompanying drawing Figs. 1 and 2 show two cross sections at right angles to each other of a basin constructed in accordance with the present invention.

Referring to the drawing, 1 indicates the semi-cylindrical bottom surface of the basin and 2- the plane side walls thereof. In bearings 3 is rotatably journalled a shaft at which coincides with the axis of the semicylindrical bottom surface 1 and supports a wing wheel. In the construction form shown this wheel consists of two naves 5 rigidly secured to the said shaft and of a number of arms 6 secured to the said naves. The edge '2' of the basin at which the stocks re supplied lies at a somewhat higher level than the shaft of the wing wheel, while the edge 8' of the basin at which the stocks leave the basin lies at a somewhat lower level than the said shaft. The liquid level of the basin is indicated by 9. The basin may in the usual manner be provided with inlet and outlet pipes for the liquid and with drawing olf devices for the wastes that may accumulate on the bottom of the basin. In case hot water or liquid (solution) is to be used for the treatment of the stocks, the heating of the liquid may be accomplished by means of well known heating devices for instance steam pipes or the like. The stocks to be treated are transported to the basin for instance on a conveyer 10 and are thereupon rolled down into the basin over the edge 7, where they are caught by a wing of the wing wheel. According as the number of stocks on said wing is increased the wing wheel is turned until the next wing comes into position to catch the stocks supplied to the basin and so on until the basin has been filled with stocks. In the continued supply of stocks to the basin the wing wheel continues its rotation and lifts the stocks first supplied above the liquid level at the discharge edge 8 of the basin where the stocks successively roll down onto a preferably inclined surface 11 from which they are removed in any desired manner. It is obvious that the time during which the stocks pass through the basin is dependent of the speed of rotation of the wing wheel which speed depends on the quantity of stocks supplied per unit of time into the basin and thus may be regulated at will.

' From the above it will be seen that the invention at the same time as it renders it possible to determine exactly the time during which the stocks pass through the basin has the great advantage that no special means whatsoever are necessary to take the stocks up from the basin.

Having now described my invention what I claim is:

The combination of a basin of the kind set forth having an approximately semi-cylincll'ical bottom surface and a freely rotatable wing or shovel Wheel journallecl insaid basin the shaft of said Wheel substantially coinciding with the axis of the curved bottom surface of the basin, and the radial length of the wings or shovels of said Wheel being such as to prevent the stocks from passing between: the bottom surface of the basin and the free ends of the Wings of saidwvheel, substantially as and for the purpose set 10 forth.

In testimony whereof I have hereuntosub seribed my name this eleventh clay of May, 1925.

AXEL EMANUEL HOLMBERG. 

